Balones yes.
I seem to recall both sides tried it and both were told to come back for the set piece.
I have managed to have a look at the home club video. (One of the privileges of NP PR status.) The sound on it is not present for some of it and some of the camerawork is a bit dodgy. However, the only two possible incidents of what you are mentioning are: –
1 - About midway through the first half the Loughborough winger knocks on but before the ball goes into touch the ball gets tangled up in his legs so does not go directly into touch. The ref is heard to say “Option. Okay no option then”, which seems to indicate that the AR had told him the situation.
2 – The second one, again about half way through the second half involves the Loughborough No8 making a break and offloading to the L No12 who flicks the ball back towards the winger. (No14) The L14 tries to gather the ball but he is tackled and he loses control of the ball and the ball goes
backwards into touch. Cambridge try a quick throw in but the referee deems there to have been an initial knock-on in the attempt to gather by the L14 before it goes into touch. At this stage there is no sound on the video. I must admit that I cannot see this knock-on but then the action is on the far side of the pitch from the camera. Because the ball went backwards before going into touch obviously there is no option. Even if it had been deemed a ‘touch’ the quick throw in would not have been allowed because the C player took the quick throw in further up the pitch than the line of touch and the AR signalled this fact by raising his flag for a second time. The AR was seen to turn round and speak to a spectator and say something. This wasn’t you was it?
These are the only possible incidents that I can see in this particular match. All the others were lineouts from penalties or kicks. I hope this explains the situation to your satisfaction.